Electrolyte for depositing copper.



W. G. GREY & W. GRIFFITH. ELEGTROLYTE roR DEPOSITING COPPER. APPLIOATION FILED PEB.23, 1910.

976,454. 7 Patented Nov. 22, 191 0.

2 SHEETS-SHEET 1.

WITNESSES INVENTORS &/ 1 E Aw W. G. GREY & W. GRIFFITH.

BLEGTROLYTE FOR DEPOSITING COPPER. APPLICATION FILED PEB.Z3, 1910.

976,454.. Patented Nov. 22, 1910.

Z SHEETS-SHEET 2.

WITNESSES INVENTORS "To a ll whom it may concern:

, UNITED [sTA'r sPATE r OFFICE.

, WILLIAM G. GREY WILLIA GRIFFITH, orrrrrtr'snune, PENNSYLVANIA.

Melisa .Be it known we, WinriinM G. GREr and YVrLLIAM Gnirrrrm of vPittslourg, inthe county of' Allegheny and" State of Pennsylvania, have invented a certain new. and useful Improvement in Electrolytes for' De- I positing Copper,,ofwhich the following is a full, clear,and--exact description,"refer.- ence being'had to the accompanyin drawings,.which form part; of. this speci cation' Our invention relates to the method of uniting.\ m etals..'-ofl'different kinds, such as iron and'steel, with copper, brass, bronze, aluminum," or other metal or alloy, which consists, generally stated, in firstg'subjecting the harder metal to a cleaning and other preparatory treatment, applying the softer shapes.

however, We will hereinafter refer to the lI'OIl or steel shape as the harder body of metal, bringingthe two metals ito-a heat, and then uniting by pressure, as will be hereinafter more fully described. v

We will. now describe our invention, referring to the accompanying drawings, so

.that others skilled iii-the 'art "to which it appertainsmay understand and practice the same.

While in the accompanying drawings we have shown our'invention as applied tothe preparation of an 'ingot, billet, or bar, it will be understood that .We do not desire to limit be apparent that our invention maybe carried out' in a'prepa'ration of tubing and other For convenience of description,

metal.

Figure 1 is a perspective view of an ingot, bille t, or bar of hard metal, having a body. of softer metal united thereto in ac cordance with our. invention; and Figs. 2, 3 and l are similar views showlng modified forms'or shapes to be hereinafter more fully referred to.

In carrying out our invention'fthe body of. harder metal 2' isfirst subjected toa" cleaning or preparatory bath-to remove the scale and oxid from the surface or surfaces to which the softer metal is to be united;

- This cleaning. bath may be the ordinary acid solution used for this purpose, After the above treatment, the body 2 may be given acoating of alkali solution, such as chr'omate potassium or-chromate sodium, so

- ELEcTRorYrE FOR nnrosrrrrne COPPER.

.as to prevent ready oz zidation of the surface or surfaces thus cleaned.

After thebody 2 of harder metal has received the'above treatment, it is placed in av solution of copper sulfate, cyanid of potas slum, and bi sulfite of soda,- from which a coating-of copper on the cleaned surface or Specification of Letters latent. Patented Nov; 22, 1910,- Application-filed i ebruar 23, 1910. Serial No. 545,324;

surfaces of the body of harder metal is caused to} be precipitated electrolytically.-

This'solutionis prepared and proportioned compound spoken of above is composed of about 60% sulfate of copp'er a'nd 40%, of bisulfite of soda. Thiscompound is placed in one gallon of water, and the three ounces of cyanid of potassium is added. To this solution is then added about one ounce ofv bi-sulfite of soda. .Electrolytical deposition of the copper from the solution to the body of 'harder'metal immersed therein, is effected in the manner Well known in the art of electroplating, and need not be here dey scribed 'in detail. ourselves to any particular shape, as it will a After the shape of harder metal base-re ceived the copper de osition in the manner above described, the ody 3 of softer metal is then applied to the copper coated surface or surfaces, and the metals are'heated to a temperature slightly below the fusing point of the softer metal, inwhich state the two metals'are united 'bysubjecting to suitable pressure device,- suchi as rolls or presses. The metals having been welded, may then be rolledor otherwise worked as desired.

Any suitable manner of attaching the .body of softer metal to'thebody of harder metal may be em loyed. In; Fig. 1 the bar I or body 2 of har er metal is shown as having the-recess t, in which is placed the body of softer metal 3, which is to be united thereto. In this constructionthe edges or flanges 5 formed by this depressed surface, serve, when pressed against the edge of the body of softer metal 3, to rigidly hold the body .3 inzpositionon the shape 2.

In Figi 2 the-body of softer metal. 3 is;

shown in the form of a shell or continuous coating 6. It, will be seen that the shell'6l may be readily placed in position on the body'2 preparatory tobeing united therewith. A further form or shape ofthe body 2 is shown in Figs; 3 and 4. In the former,

Fig.- 3, the body of softer metal isshown in the form of the core 7 while in the latter,

, Fig- 4, it is shown as having .both a core 7 and an outside shell or coating 6. .These latter shapes, "that .is, the shapes shown in Figs. 2, 3 and 4, are such as may be employed in the production ofwire' rods and the like.-

.The advantages of our invention'will be appreciated by those skilled in the art. The bi-sulfite of soda conduces to clarity and homogeneity of the copper coatingpreoipitated to the surface or surfaces of the iron or steel shape, resulting in a perfect union of the metals when ,subsequentlyunited in the manner above described.

.WILLIAM G. GREY. v WILLIAM GRIFFITH. Witnesses:

M. ARTHUR KELLER,

MARY'A. EARTH. 

